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9017834 Lubricants for data storage  
Disclosed herein are compounds of formula I: X-(L-Z)p-L-R[L-(Z-L)p-Y]q (I) wherein L is a perfluoropolyether; R is q can be an integer equal to or greater than 1; p can independently be integers...
9005782 Magnetic disk and method of manufacturing the same  
Provided is a magnetic disk that is excellent in durability, particularly in LUL durability and CFT properties, and thus has high reliability despite the low flying height of a magnetic head...
8999534 Lubricant for magnetic disk and magnetic disk  
A lubricant for a magnetic disk that is excellent in heat resistance and is suitably used in a magnetic disk to be mounted on a magnetic recording device of a thermally assisted magnetic recording...
8999533 Magnetic disk and method of manufacturing the same  
Provided is a magnetic disk comprising a lubricating layer formed of a lubricant. The lubricant constituting the lubricating layer has excellent properties, for example, excellent fluidity,...
8980450 Lubricant and magnetic disk  
A lubricant containing a compound (A) comprising a perfluoropolyether having a main-chain structure of the formula (1) and having a polar group at each of opposite terminals thereof, and a...
8980449 Magnetic recording medium, manufacturing method, and use thereof  
A magnetic recording medium includes a nonmagnetic substrate provided on which are, in the order recited; an underlayer; a magnetic layer; a protective layer comprised of carbon; and a lubricating...
8936859 Cyclophosphazene compound, lubricant comprising same, and magnetic disk  
A cyclophosphazene compound of the formula (I), and lubricants and magnetic disks using the compound wherein n is 2, 3 or 4, m is an integer of 1 to 12, R is C1-4 fluoroalkyl and Rf is...
8852763 Perfluoropolyether containing lubricants with mixed end groups  
Compounds of formula I: wherein X are independently —(CH2)b—, wherein b is 0 or an integer from 1 to 6; Rf are independently —CF2O(CF2CF2O)p(CF2)qCF2—, —CF2CF2O(CF2CF2CF2O)rCF2CF2—, or...
8841008 Lubricant for heat assisted magnetic recording  
Compositions for use in lubricating thin film storage media are provided, as well as storage media formed using the compositions, the compositions including one or more central cores having a...
8828565 Lubricant composition, fluorine-based compound, and use thereof  
Disclosed is a lubricant composition comprising at least one kind of compound represented by following formula (1): where X represents a cyclic group that may be substituted; Y represents a...
8734966 Fluoropolyether compound, lubricant and magnetic disk each containing the same  
A compound of the formula (1), lubricant containing the compound and magnetic disk R1—C6H4O—CH2CH(OH)CH2OCH2—R2—CH2—O—R3 (1) wherein R1 is hydrogen, alkoxyl having 1 to 4 carbon atoms, amino or...
8722213 Lubricant with non-terminal functional groups  
Lubricant with non-terminal functional groups. The location of the functional groups minimizes free chain length and molecular weight of a lubricant while simultaneously maximizing evaporation...
8697262 Lubricant for magnetic disc, magnetic disc and method of producing the same  
A magnetic disk in which at least a magnetic layer, a protective layer, and the lubrication layer are sequentially provided on a substrate, the lubrication layer contains a lubricant compound for...
8685548 Lubricant compositions  
Compositions including one or more a central cores having a cyclic group, and a plurality of arms extending from the central cores, wherein the arms comprise perfluoropolyethers (PFPEs) or its...
8679655 Lubricant and magnetic disk  
A lubricant containing a compound (A) comprising a perfluoropolyether having a main-chain structure of the formula (1) and having a polar group at each of opposite terminals thereof, and a...
8679656 Lubricant and magnetic disk  
A lubricant containing a compound of the formula (I) wherein n is substantially 2, 3 or 4, R is C1-4 fluoroalkyl and Rf is —CF2O(CF2CF2O)x(CF2O)yCF2— or —CF2CF2O(CF2CF2CF2O)zCF2CF2— in which x, y...
8668995 Fluoropolyether compound, lubricant and magnetic disk each containing the same  
A compound of the formula (1), lubricant containing the compound and magnetic disk C6H4—(O—Z—R—X)2 (1) wherein Z is —CH2CH2O— or —CH2CH(OH)CH2O—, R is —CH2CF2CF2CF2O(CF2CF2CF2CF2O)nCF2CF2CF2CH2—,...
8663822 Lubricant layer that provides a stable head-to-disk interface in humid conditions  
In one embodiment, a magnetic disk medium includes a nonmagnetic substrate, a magnetic recording layer above the nonmagnetic substrate, a protective layer above the magnetic recording layer, and a...
8628868 Fluorinated polytetramethylene glycol (PTMG) with diepoxide endgroups as magnetic lubricants  
A surface agent includes two end portions and a middle portion disposed between the end portions. The end portions include a terminal section and a midsection. The terminal section includes at...
8628869 Magnetic media and magnetic recording devices using fluorine compounds  
According to one embodiment, a lubricant includes a perfluoropolyether having a chemical structure of: wherein Rf is at least one of: —CF2O(CF2CF2O)m(CF2O)nCF2— and —CF2CF2O(CF2CF2CF2O)kCF2CF2—,...
8623529 Method of producing a perpendicular magnetic recording medium and perpendicular magnetic recording medium  
An object of the present invention is to provide a perpendicular magnetic recording medium including a suitable lubricating layer with sufficient durability, moisture resistance, and contamination...
8623800 Lubricant suitable for use with magnetic disk  
A lubricant according to one embodiment includes a first ingredient and a second ingredient, said first ingredient as the main constituent being a first perfluoropolyether compound represented by...
8518564 Perfluoropolyether lubricant and systems comprising same  
A surface agent includes two end portions and a middle portion disposed between the end portions. The end portions include a terminal section and a midsection. The terminal section includes at...
8492011 Lubricant compound for a magnetic disk, magnetic disk, and method of manufacturing the same  
In a magnetic disk that has at least a magnetic layer, a carbon-based protective layer, and a lubricating layer formed in this order over a substrate, the lubricating layer contains a lubricant...
8481468 Lubricant with non-terminal functional groups  
Lubricant with non-terminal functional groups. The location of the functional groups minimizes free chain length and molecular weight of a lubricant while simultaneously maximizing evaporation...
8445123 Lubricant for magnetic recording media, and magnetic recording medium using the lubricant  
A magnetic recording medium having high bonding capability between the surface lubricant and the diamond-like carbon (DLC) protective layer in the surface of the magnetic recording medium is...
8410034 Ether composition  
Provided is an ether composition containing at least two ether compounds each of which has from 1 to 4 groups represented by formula (X) and from 0 to 3 groups represented by formula (Z), where...
8092931 Magnetic disk, method of manufacturing the magnetic disk and method of evaluating the magnetic disk  
A protection layer containing carbon as a major component is deposited by plasma CVD. The protection layer has film quality such that, when a spectrum is obtained by excluding photoluminescence...
8062778 Magnetic recording disk and method for manufacture thereof  
In order to obtain a magnetic recording disk that exhibits high reliability even if the flying height of a magnetic head becomes very narrow, a lubricant is specified in terms of both molecular...
8039132 Perfluoropolyether compound, and lubricant and magnetic disk each using the same  
A compound of the formula (I), and lubricant, and magnetic disk each using the same A-(CH2—Rf—CH2O—B—O)n—CH2—Rf—CH2-A (I) wherein n is an integer of 1 to 4, A is a group of the formula (a) below,...
8007932 Magnetic disk and magnetic disk unit  
Embodiments of the present invention provide a magnetic disk having a lubricating layer formed on the surface thereof, which meets all the requirements for adhesiveness, adequate flowability, and...
7998912 Composite lubricant for hard disk media  
A composite lubricant for recording disk media, a recording disk media including a layer of the composite lubricant, and method of manufacturing the same are described. The composite lubricant may...
7986492 Process for filling a patterned media of a hard disk with UV-cured lubricant  
A patterned disk for a hard disk drive. The patterned disk includes a magnetic material over a substrate. The magnetic material includes a plurality of grooves. The grooves are filled with a...
7910233 Magnetic recording medium for thermally assisted recording  
A magnetic recording medium for use in a thermally assisted recording system is disclosed. The magnetic recording medium comprises at least a magnetic layer, a protective layer and a lubricant...
7833641 Magnetic disk  
Disclosed is a magnetic disk which has a lubricant layer with excellent heat resistance and high adhesiveness and is free from fly-stiction failure or corrosion failure even at an extremely low...
7682712 Stability polymeric lubricants and thin film recording media comprising same  
A data/information storage and retrieval medium comprises: (a) a substrate having a layer stack thereon, the layer stack including an outer surface and comprising at least one magnetic or...
7531250 ***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST***
Stability polymeric lubricants and thin film recording media comprising same
 
A data/information storage and retrieval medium comprises: (a) a substrate having a layer stack thereon, the layer stack including an outer surface and comprising at least one magnetic or...
7510999 Lubricant composition for magnetic recording media  
A lubricant composition is provided comprising a first liquid lubricant and a second liquid lubricant, wherein the first liquid lubricant contains a cyclotriphosphazene ring attached to at least...
7354666 Photo process to improve tribological performance of thin lubricant film  
A system and method for improving the durability and reliability of recording media used in hard drives is disclosed. A protective overcoat made of diamond like carbon (DLC) is first deposited...
7277254 Magnetic recording disk and process for manufacture thereof  
A magnetic recording disk having a substrate, a magnetic layer formed on the substrate, a protective layer formed on the magnetic layer and a lubricant layer formed on the protective layer, the...
7247397 Thermally stable perfluoropolyether lubricant for recording media  
The invention provides a lubricant useful in magnetic recording media and optical recording media comprising a functionalized perfluoropolyether comprising multiple acrylate endgroups. More...
7199087 Method to refine lubricant for a magnetic recording medium  
A method refines a lubricant comprising a compound having a perfluoropolyether structure via supercritical extraction. A lubricant is refined using the method and a magnetic recording medium that...
7105241 Magnetic disk and method of manufacturing same  
Disclosed is a method of manufacturing magnetic disks, comprising a magnetic layer, a protective layer, and a lubricating layer on a substrate. In the process, a lubricant alpha comprising a...
6911420 Method of refining a lubricant for use on a magnetic recording medium  
A method to refine a lubricant on a magnetic recording medium includes a compound A including a perfluoropolyether molecular structure having two hydroxyl groups at each of two ends and a compound...
6773784 Magnetic disk having ultrathin carbon protective film and magnetic disk apparatus  
The object of this invention is to provide a magnetic disk which has an excellent durability even with a protective film having a small film thickness of 4 nm or less. The magnetic disk of this...
6761974 Polymeric lubricants with improved stability and thin film recording media comprising same  
A data/information storage and retrieval medium, comprising: (a) a substrate including a layer stack thereon, the layer stack including a surface and at least one magnetic or magneto-optical...
6740414 Magnetic recording media and magnetic recording apparatus used thereof  
The disclosed invention provides a high-reliability magnetic recording apparatus, magnetic recording medium, and a method of manufacturing such a medium in a high-density magnetic recording...
6730403 Magnetic recording medium and method for manufacturing the same  
A lubricant for a magnetic recording medium that imparts resistance to degradation, improved lubrication quality and better CSS durability to the medium, even when using a low levitating head. The...
6663971 Branched perfluoro polyethylene glycol (PF-PEG) high performance thin film disk lubricants  
A non-linear perluoro polyalkylene or perfluoro polyarylene glycol of specific molecular conformation such as plate-like, spherical, or helical and having the formula CFx—[—(—RO—)n—CF3]4−x,...
6608009 Phosphazene compounds and lubricants containing the same  
A phosphazene compound of the formula (1) or (5) which has an arrangement such that perfluoroxyalkylene units selected from —CF2O— and —CF2CF2O— are randomly distributed, the compound having a...
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